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Date:      Mon, 3 Jan 2000 22:10:18 -0500 (EST)
From:      "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com>
To:        ajk@paw-in-eye.net (Alec Kloss)
Cc:        jmutter@commercialmovers.com (James A. Mutter), freebsd-questions@FreeBSD.ORG
Subject:   Re: x.x.x.x on pn0 but got reply on pn1
Message-ID:  <200001040310.WAA11524@cc942873-a.ewndsr1.nj.home.com>
In-Reply-To: <200001031845.MAA13399@D2SI.COM> from Alec Kloss at "Jan 3, 2000 12:45:58 pm"

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Alec Kloss wrote,
> James A. Mutter said:
> 
> > What's causing this?  I'm getting an occasional kernel error complaining
> > that '111.222.333.444 is on pn0 but got reply on pn1' -
> > 
> > pn0 = "inet 192.196.1.10 netmask 255.255.255.0"
> > pn1 = "inet 207.XXX.X.XX netmask 255.255.255.248"
> > 
> > Ideas?  Need more info - let me know.
> > 
> 
> It looks very much like you've got two network cards plugged onto the
> same lan.  I ran a box like this for several days until I got around 
> to buying a second hub to make the private network truly private.  It
> didn't seem to cause any problems.

Having two cards on one LAN lowers the overall throughput on the
network to which they are attached. Depending on how the network is
configured, your "private" network may be leaking out to the public
(e.g. when the device to the outside world is a bridge).

If you have one physical network, you should be using _one_ NIC with
an alias. /etc/rc.conf would look like this,

ifconfig_pn0="inet 207.XXX.X.XX netmask 255.255.255.248"
ifconfig_pn0_alias0="inet 192.196.1.10 netmask 255.255.255.0"

-- 
Crist J. Clark                           cjclark@home.com


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